Kitakyushu, Japan

Osamu Tokunaga

This inventor holds 9 USPTO granted patents. Top assignee: Toto Ltd.. Active years: 1992-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Osamu Tokunaga. Retrieved from https://idiyas.com/inventor/osamu-tokunaga

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 3.7

ph-index = 7

Forward Citations = 186(Granted Patents)


Location History:

  • Fukuoka, JP (1992 - 2002)
  • Kitakyushu, JP (1995 - 2007)

Company Filing History:


Years Active: 1992-2007

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9 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Osamu Tokunaga

Introduction

Osamu Tokunaga is a notable inventor based in Kitakyushu, Japan. He has made significant contributions to the field of valve technology, holding a total of 9 patents. His work primarily focuses on improving the functionality and efficiency of mixing faucets and pressure reducing valves.

Latest Patents

Among his latest innovations is a switching valve assembly designed for use in mixing faucets. This assembly features a manual operation member that responds to user input, a push rod, and a pilot valve, all working in conjunction to enhance user experience. Another significant patent is a pressure reducing valve that includes a valve support member with a water passage, a cup-shaped valve body, and a resilient member to ensure optimal performance.

Career Highlights

Osamu Tokunaga has dedicated his career to advancing valve technology. His work at Toto Ltd. has positioned him as a key player in the industry, where he continues to innovate and develop new solutions for everyday plumbing challenges.

Collaborations

Throughout his career, Tokunaga has collaborated with esteemed colleagues such as Masatoshi Enoki and Masahiko Imazono. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Osamu Tokunaga's contributions to valve technology exemplify the spirit of innovation. His patents not only enhance the functionality of plumbing systems but also reflect his commitment to improving everyday life through engineering.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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